by Kastro
Paper/Archive/CVE-2025-64486

CVE-2025-64486

kovidgoyal calibre — calibre is vulnerable to arbitrary code execution when opening FB2 files

EPSS 0.2%CVSS 9.3
critical.is priorityof 100
30
CVSS 9.3 (CNA)9.3 / 10 × 3027.9Not in CISA KEV+300.0EPSS percentile 8.8.088 × 201.8No public exploit+100.0SSVC exploitation: none+100.0
Description · from the CVE record

calibre is an e-book manager. In versions 8.13.0 and prior, calibre does not validate filenames when handling binary assets in FB2 files, allowing an attacker to write arbitrary files on the filesystem when viewing or converting a malicious FictionBook file. This can be leveraged to achieve arbitrary code execution. This issue is fixed in version 8.14.0.

Affected

ProductAffectedFixed inSource
calibre< 8.14.0–CNA

Scores by source

GitHub_M (CNA)9.3CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H
CISA ADPSSVCExploitation: none · Automatable: no · Technical impact: total

References

refgithub.com/kovidgoyal/calibre/security/advisories/GHSA-hpwq-c98h-xp8grefgithub.com/kovidgoyal/calibre/commit/6f94bce214bf7d43c829804db3741afa5e83c0c5